Ore-classifying machine.



S. l. CLAWSON.

ORE CLASSIFYING MACHINE.

APPLICATION FILEDJULY 29, 1910.

1 ,1 91 ,280. Patented July 18; 1916. Q

3 SHEETS-SHEET ls. l. CLAWSON. ORE CLASSIFYING MACHINE.

APPLICATION FILED JULY 29,1910.

Patented July 18, 1916.

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S I. CLAWSON.

ORE CLASSIFYING MACHINE.

' APPLICATION HLEp JULY 29,1910.

Patented July 18, 1916.

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sntnnn IRWIN CLAWSON, or SALT LAKE CITY, UTAH.

ORE-GLASSIFYING' MACHINE.

Specification of Letters Patent.

Patented July 18, 1916.

Application filed July 29, 1910. Serial No. 574,563.

To all whom it may concern Be it known that I, SELDEN I. CLAWSON, a citizen of the United States, residing at Salt Lake City, in the county of Salt Lake, State of Utah, have invented certain new and useful Improvements in Ore-Classifying Machines, of which the following is a description, reference beinghad to the accompanying drawing, and to the letters and figures of reference markedthereon.

This invention relates to ore classifying machines, and more particularly to that class of machines in which a series of inclined screens are arranged -in a -zig-zag manner, over which the ore to be classified travels, the object being to provide a machine which is very strong and durable, and one in which partitions are set at right angles to the axis of the screen so that the ore is caused to travel over the screens a great number of times, thereby increasing the.

screening capacity,

Another object is to provide a screen and pan with a pluralityof.alternately arranged partitions for retarding the movement of the material over the screen, whereby the material will be thoroughly classified as it travels over the same. 1

Another object of my invention is to provide means for cleaning the meshes of the screen, said means comprising nozzles. from which jets of water are adapted-to be forced upon the outside of the screen when the same is rocked or revolved, in order to force theaccumulated matter off the screen.

Another object of my invention is to provide a combined screen and pan which is placed on an incline, the ore entering the upper end of the screen, and passing over the screen in a zigzag manner when the same is rocked or revolved, the ore first being held on the pan and then thrown onthe screen, whereby the material is first mixed and saturated with water in the pan, and then thrown against the screen.

lVith these objects in view, the invention consists in the novel features of construction, combination and arrangement of parts,

hereinafter fully described and pointed out in the claims.

In the drawing forming a partof this specification :Figure 1 is a side elevation of my improved ore classifying machine. Fig. 2 is an end elevation of the same. Fig. 3 is a top plan view of a combined screen and pan. Fig. '4: is a transverse" section combined screen and pan. Fig. 7 is a trans verse section through another form of screen. Fig. 8 is a transverse section th rouglra U-shaped form of screen and pan. Fig. 9 1s a longitudinal section through a cylindrical form of screen and pan. Fig. 10 is a transverse section through the same. Fig. 11 is a transverse section through a modified form of combined screen and pan. Fig. 12 is a plan view of still another form of a combined screen and pan.- Fig. 13 is a slmilar section through a combined screen and pan as that shown in Fig. 11, the same being tilted to clearly illustrate the action of the wing.

A revolvingscreen with fiat sides or a revolving round screen could be substituted for the rocking screen in Figs. 1, 2, and 3.

Referring to the drawing, 1 indicates the frame of my improved machine which is provided with a series of inclined bars 2 arranged in a zig-zag manner carrying troughs 3 provided with outwardly extendingred-uced ends 4, under which are mounted conveyer tubes 5 for carrying the material 011, and said troughs are provided with dis charge spouts 6 adjacent their. ends from which the small particles are adapted to be discharged into the screen below, as will be hereinafter fully described.

Mounted in suitable bearings carriedby the frame 1 parallel with the troughs, are inclined-screens 7 mounted on a suitable supporting shaft and each having an imperforate pan portion and screening portions. Said screens are adapted to be rocked within the troughs 3, each trough being arranged over the next screen below in such a manner thatthe water and ore which has passed through the screening portions will be deposited into the screen below, in order to carry the material through all of the screens.

Mounted on the top of the frame is a water tank 8, from which extends a pipe 9 having a. series ofbranchpipes carrying nozzles 10, arranged parallel with the screens andadapted to throw jets of water upon the screens, for saturating the material, and for cleaning the meshes of the screen when the same are rocked or revolved. While I have shown and described nozzles arranged for supplying the water to the screens, it of course is understood that a trough, an automatic pipe, a tap to flush the screen automatically at the opportune moment, or any other suitable means could be employed.

Any suitable mechanism can be employed for imparting this motion to the screens, and in the drawing I have shown the shafts carrying the screens provided with pulleys 11 over which pass belts 12 carried by pulleys mounted on the lower shaft which is driven by suitable driving means 13 which causes the lower shaft to oscillate in order to rock the respective shafts. The mechanism is so constructed that the same can be adjusted in order to impart a rotary motion to the shafts when it is desired to use a cylindrical screen as will be later described.

I In Figs. 3 and 4 I show a V-shaped frame 1 1 which is provided with a solid wall and bottom 15 forming a pan, and a reticulated side 17 forming a screen. The walls of the screen and pan are provided with partitions 18 alternately arranged and terminating at the longitudinal center of the frame, where by the material deposited at the upper end of the screen will be retarded in its movement over the same, the ore being mixed and saturated with water when on the pan portion of the frame, and when rocked is thrown on the screen. As the material is carried over the screen the under size pass through the same, and the over size is held, and when the screen rocks back a jet of water flushes the over-size ofi the screen, causing the same to flow below the respective partitions of the pan, and it will be seen that each time the screen is rocked this operation is repeated until the ore has passed out of the end of the screen.

In Fig. 5 I show a similar shaped frame 19 which is provided with a solid bottom 20 and reticulated sides 21 and with alternately arranged partitions which terminate at its longitudinal center, and as the same is rocked the ore is first thrown upon one screen and then upon the other from the pan formed by the solid bottom, and at the same time jets of water are thrown upon the screens so as to clean the meshes. Each time the frame is rocked the 'ore will pass down the same in a zig-zag manner, first being thrown upon the one screen and then upon the other so as to IGIIIOVG the small particles, the large particles passing out of the screen into the trough.

In Fig. 6 I show a rectangular frame 21 having a solid bottom and top, and reticulated sides which can be either rocked or rotated, and it will be seen that when the same is rocked the material passing through the frame will be first thrown upon one screen and then the other.

In Fig. 7 I show a semi-circular screen 22, having alternately arranged partitions 23 for retarding the movement of the material over the same.

In Fig. 8 I show a U-shaped frame 24 having a reticulated bottom 25 and solid sides 26, having similarly arranged partitions 27, and by this construction the sides form pans upon which the material is thrown when the same is rocked so as to maintain the same in av moist condition.

In Fig. 9 I show a cylindrical frame 28 having longitudinal oppositely disposed strips forming pans, in whichI arrange a screw 29 for retarding the movement of the material through the same when the cylinder is rotated.

In the modification shown in Figs. 11 and 13, I provide the combined screen and pan with a longitudinal wing 30 extending from the screen upon the outside for holding the water when forced against the screen, so that the same will be carried through the screen.

In Fig. 12 I show a slightly modified form of combined screen and pan, in which the partitions 31 extend across the pan to the screen, whereby the washing of the material through the same is increased. By stopping the partitions to one side of the longitudinal center the light particles will travel out onto the screen, and the heavy particles will lag behind and remain on the pan, and when the screen rocks back the flush water will carry the over-size from the screen and pan down the same.

It is evident that many slight changes might be resorted to in the relative arrangement of parts shown, and described with out departing from the spirit and scope of my invention. .Hence I would have it understood that I do not wish to confine myself, to the exact construction of parts shown and described.

What I claim is 1. An ore classifying machine comprising a support, an inclined swinging screen mounted in said support, and having an i1nperforate pan portion forming the bottom of the screen, and screening portions extending longitudinally thereof and forming the sides of the screen, means for swingingsaid screen, and means for retarding the movement of the material along the screen.

2. An ore classifying machine comprising a support, an inclined swinging screen mountedin said support, and'having an im perforate pan portion forming the bottom of the screen. and screening portions extending longitudinally thereof and forming the sides of the screen, means for swinging said screen, means for retarding the movement of the material along the screen, a trough arranged underneath said screen, and means whereby jets of water may be thrown onto said screen for saturating the material and for cleansing the meshes of the screen as the same swings.

3. In an ore classifying machine, a support, a plurality of swinging screens mounted in said support, said screens being inclined relative to each other and arranged in a zigzag manner, each screen having an imperforate pan portion forming the bottom of the screen, and screening portions extending longitudinally thereof and form ing the sides of the screens, means for swinging each screen, and means for retarding the movement of the material along the screens.

4. In an ore classifying machine, a support, a plurality of swinging screens mounted in said support, said'screens being inclined relative to each other and arranged in a zigzag manner, each screen having an imperforate pan portion forming the bottom of the screen, and screening portions extending longitudinally thereof and forming the sides of the screens, means for swinging each screen, means for retarding the movement of the material along the screens, and a trough underneath each screen for discharging the contents passing through one screen into the screen beneath. it.

5. In an ore classifying machine, a support, a plurality of swinging screens mounted in said support, said screens being inclined relative to each other and arranged in a zigzag manner, each screen having an imperforate pan portion forming the bottom of the screen, and screening portions extending longitudinally thereof and forming the sides of the screens, means for swinging each screen, means for retarding the movement of the material along the screens, a trough underneath each screen for discharging the contents passing through one screen into the screen beneath it, and means for directing jets of water onto each screen for saturating the material and for cleansing the meshes of the screens as the same are swung.

In testimony whereof I affix my signature, in presence of two Witnesses.

SELDEN IRWIN CLAWSON.

Witnesses:

WM. T. FOULGER, W. EDWARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

